Following instruction is executed in 8085, LDB 4000H

Identify the correct statement.

Question

Question

This question was previously asked in

HPCL Engineer Instrumentation 11 Aug 2021 Official Paper

Answer 1

Solution

LDB 4000H

In 8085 instruction set
LDB mnemonics means Load the register B with the contents from the memory
In this instruction set, the register B will get initialized with 8-bit content present in the 16-bit memory address
This is an absolute addressing mode that occupies 3-Bytes of memory
1 Byte for the opcode and the successive 2 Bytes are for the 16-bit memory location (4000H)
It has 4 machine cycles (opcode fetch, memory read, memory read)
It has 13 T states

Hence the correct answer is option 4

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